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Commitments and Contingencies (Minimum Annual Rental Commitments) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]      
Total lease expense $ 9,055 $ 7,924 $ 7,506
2020 7,149    
2021 5,291    
2022 3,124    
2023 1,602    
2024 1,085    
Thereafter 1,789    
Total $ 20,040